static BWImage audio_clipFromLastEntryPointToExitPoint(BWImage img) {
  Int entryPoint = last(audio_entryPoints_v1(img));
  int x1 = or(entryPoint, 0);
  Int exitPoint = firstIntBiggerThan(x1, audio_exitPoints_v1(img));
  int x2 = or(exitPoint, img.getWidth());
  ret clipBWImage(img, x1, 0, x2-x1, img.getHeight());
}